Brush and timber cutting device.



W. F TWOMBLY.

BRUSH AND TIMBER cumm; DEVICE. APPLICATION EILED .VIUNE 30. I916.

1 2%,fi31 D Pmmd May 8,1917.

VIILLIAM FIREDRIGK TWOMBLY, OF GRXEI'IT, IQNA.

BfzEtUfiH AND TIMBER CUTTING DEVICE.

Application filed June 30, 1916.

To aZZ whom 2'25 may concern: y

Be it known that l, Wintreiu Fnnniucx TVv'OMBLY a citizen of the United States, residing at Urient, in the county of Adair and State. of Iowa, have invented certain new and useful Improvements in Brush and TimberCutting Devices; and I do hereby declare the following to be a full, clear, and exact description orthe invention, such as will enable others skilled in the art to which 1t appertains to make and use the same. My invention relates to new and useful improvements in brush and timber cutting devices and my object is to provide a saw structure and means for operating the same.

A further object is to provide a sledstructure for transporting the saw structure and its operating means from place to place.

A further object is to provide means for holding the sled structure against skidding.

A further object is to provide a cutting device to be substituted for the saw structure for cutting brush, weeds, and the like.

And a further object is to provide means for changing the stroke of the pitman adaptingthe same for use in connection with the saw structure or cutting device.

Other objects and; advantages will be hereinafter set forth and more particularly pointed out in the accompanying specifica' tion.

In the accompanying drawings which are made a part of this application.

Figure l is a top plan View of the saw structure and carrying device therefor.

Fig. 2 is a detail plan view of a portion of the sled structure showing the manner of attaching the brush cutting device thereto.

Fig. 3 is a sectional view, as seen on line 3-3 of Fig. 2, and

Fig. 4; is an enlarged elevation of a portion of the sled structure showing the manner of anchoring the same against skidding.

Referring to the drawings in which similar reference numerals designate corresponding parts throughout the several views, 1 indicates a sled structure comprising side rails or runners 2 and cross bars 3- employed for holding the side rails in spaced relation.

Attached to the inner face of one of'the side rails 2, which is made longer than the opposite side rail, is an arm 4 of a frame 5, said frame forming a guide for a saw 6, the arm a being attached to the side rails 2 by means of a ball and socket joint 7 so that Specification of Letters Patent:

Patentei'li hflay (55, 3" 93?.

Serial He. 1%,936.

said frame and saw carried thereby may have free lateral and vertical movement.

The saw 6 is operated from any suitable form of engine (not shown) carried by the sled structure 1 at a point between its ends the power from the motor being transmitted.

to the saw from a pulley 8 of the motor through a belt 1), to a pulley 10 mounted upon a shaft 11, said shalt 11 being in turn ends of the )itman bein attached resoecl g l tively to the saw and gear 14 through the medium of ball and socket joints 18 and 19. whereby the saw will be positively driven at whatever angle the same may be disposed. The pulley 10 is preferably loosely mounted upon the shaft 11 so that in order to cause the motor to drive the shaft 11, a clutch 20 is slidably mounted upon the shaft 11 but fixed thereon to cause the shaft to rotate, said clutch being thrown into or out of gear with the clutch face of the pulley 10 through the medium of a lever 21.

This form of device is used for sawing timber and is principally designed for clear ing land of shrubbery where the bushes are too large to becut with an ordinary sickle bar, but when the under growth or shrub bery consists of'small sprouts or weeds, that form of device shown in Fig. 2 is employed which consists of a sickle bar 22 having a sickle 23 cooperating therewith, the arm 24: of the sickle bar beingattached to the side rail 2 with a ball and socket joint 25, while the pitman 26, employed for reciprocating the sickle 23, is attached at its ends with ball and socket members 27 and 28.

When this form of device is used, the gears 13 and let are reversed with respect to the shafts 11 and 15, thereby greatly increasing the stroke of the pitman 26 and the sickle attached thereto.- In order to tilt the sickle bar a lever 29 is mounted upon one of the side rails 2, said lever having anextension 30 which engages aroller 31 carried-by th "v: e and the sickie be]? is held in pry/pet 11!;6111611'5 by means or. e hill: 36, one

if the s T end of which is pivoted to one o is, and the opposite end to a shoe 3'? at Liner end of the sickle order to prevent the set-5d from skidwhen being own over snow co Ql ifliiid or ice, 1 1f1%.OV fi% anchoring 38 which extend th ugh soekets side rails 2, the upper ends of said 7 attached to levers it pivotaiiy w d on stimdz'trds 4:1 s11 level-s having .cts i in then lower ends so arranged the when the lovers are in a, vertical position, the prongs will be forced downwerdty into the surface over which the sled structure passes, but when. in e horizontal p0sitioh wiii elevate the prong to at point above the eoi face over which the sled structure 'l'fhis device can be vetvy cheaply constiucted and can be used for cutting small or large timber or for cutting briers, sprouts, brush, and the like, and by attaching a draft enimet to the sled structure, a large area can be o er in a short length of time.

wiil iihewise be seen that the device can be used 0V8}! either smooth or uneven surfaces, owing to the manner of flexibly connecting the cutting parts to t e sled structure.

it will likewise be seen that by leversing the gears upon the shafts, the speed of 1 an may be increased or decrees-ed. at when g the pitman 1n coonectloh with tore oi it power driven sharit "my;

teta-biy p the sled struotm'e, intermeshmw mounted thereon, at second shaft 1'0 mounted o A gems attached to said shafts, one of said gears being huge? than the other frame an arm extending from said im-11162 bold. and socket j oint connec ing arm to the sled ctructui'e, a saw reel ed in 2 mid frame, pith-12:21, bed and socket joint out each end of said pitmen connecting the ends of the pitmzm i said saw and one of said genre respectiveiy, a ciuteh :neche Diem on power driven shaft 2, love adapted to connect o1 disconnect the ciutch o the 1 j sled. etructmre i 2. The combination with a sled. of an arm, a boil and socket joint connecti d arm with the sled, a guide frame carried by the outer end of said arm, ev cutter bar. yecip rocatingiy mounted in said frame, a power driven gear mounted upon the sled, a, pit men, and ball and socket joints connecting the opposite ends of said. pitmen .vith the cutter bar and the power dyiven respectively, said ball and socket joints of the arm and pitnmn permitting the cutter be? to be moved vertically and letereily with respect to the sled.

in testimony whereof I have signed my name to this specification in presence of two subscribing witnesses WILLIAM FREhEIUK TWQBLEBLY,

Witnesses:

J. E. WILSON, GHAS. CLARK,

oi potent may be ebteioefi oe'te eeeh, by; az'tihzessing the fiommisstoherr or? agiy mount- 

